CAT JL 7 Mono Block Power Amplifiers

Overview

Philosophy is the most important aspect of any design. CAT’s philosophy is to design their products to neither add to, nor detract from, the music. They never attempt to cover up a design problem with another problem, nor do they introduce a supposedly complementary problem to “synergise” with it. Two wrongs do not make a right. Only the eradication of the problem is correct.

The JL7 was designed to bring the famous CAT quality into a smaller more convenient chassis and make tube biasing much easier. The JL7 even uses the same driver tube technology as T H E S T A T E M E N T amplifier. This driver is specifically optimised for the high current KT150 tube, but also yields superior results with the venerable 6550/KT88 tube. The new JL7, delivers the famous CAT “drive anything” sound in full measure!

With triode purity, transparency, and vibrancy that surpasses even the most refined low power single ended triode amplifiers combined with brute force current delivery exceeding all other tube amps, even those rated at four times the power, the JL7 is an amplifier which will force you to reevaluate your reference standards.

Power Supply
The power transformer is encased in a separate nickel plated steel housing to contain the magnetic field.

The isolation transformer eliminates entry of AC power line noise into the amp, yielding greater benefits than add-on conditioners without any of their sonic drawbacks or expense.

Ultra-wide open loop in-circuit bandwidth of the output transformer enables operation of the amp’s closed loop response entirely within the open loop response, eliminating any requirement to use high feedback to force the output stage to perform beyond its natural capability.

Constrained dampening layer on top plate silences vibration before it can be converted to electro-mechanical noise.

The output transformers are enclosed within their own magnetically isolated housing which is lined with Birch plywood (one of the most musical woods) and potted in place with a combination of epoxy and elastomers for mechanical stability and control.